QUIZ 1. What type of chemical signaling is involved between neurons using neurotransmitters? a. Autocrine b. Direct cell to cell contact c. Paracrine d. Endocrine 2. What type of cell signaling happens over the longest distances? a. Autocrine b. Direct cell to cell contact c. Paracrine d. Endocrine 3. What is the main effect of the binding of an intracellular ligand? a. Induction of transcription of DNA b. Induction of an ion channel c. Change in post-transcriptional modification of proteins d. Binding of two enzymes to make ATP 4. Which type of cell signaling involves plasmodesmata? a. Paracrine signaling b. Autocrine signaling c. Endocrine signaling d. Cell to cell signaling 5. Which is not an amino acid that can be phosphorylated? a. Glutamate b. Tyrosine c. Serine d. Threonine
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